Hey!

I do a little bit of recording using a condenser mic, mixer and my laptop. I use a cable that connects the 2 RCA ports of the mixer to the 3.5mm mic jack in my laptop, which worked fine. When I tried this with my new laptop (which has a combined mic/speaker jack), the audio I recorded had a lot of crackling/white noise.

What can I do to fix this?
Could I use a RCA to USB cable to record instead?

Thanks in advance!